Question

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1. A car completes the journey from A to B at a
constant speed of 20 km/hour and covers the retum
journey from B to A at a constant speed of 30
km/hour. The average speed for the total journey
from A to B and back is -
​

Answer 1

Step-by-step explanation:

First speed v1= 20km/hr

Second speed v2 = 30km/hr

average speed= ( v1 + v2 )/2

(30+20)/2

50/2 = 25 km/hr